Home location register and method of routing calls to portable numbers in a radio telecommunications network
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United States of America Patent
Stats
-
May 1, 2001
Grant Date -
N/A
app pub date -
Aug 28, 2000
filing date -
Oct 7, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A home location register (HLR) and method of routing a call directed to a portable directory number in a radio telecommunications network. The network includes an originating mobile switching center (O-MSC) and a Number Portability Database (NPDB). The O-MSC first sends a Location Request (LOCREQ) message to the HLR requesting a routing number. The LOCREQ message includes a dialed directory number. The HLR determines whether a routing number is assigned to the dialed directory number. If not, the HLR sends a Number Portability Request (NPREQ) message to the NPDB and includes the dialed directory number. A location routing number (LRN) assigned to the dialed directory number is then retrieved from the NPDB and sent to the HLR. The HLR forwards the LRN to the O-MSC, which then routes the call to the LRN.
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